i dunno about the companies that you asked about, but i was working at a plant and a guy on the line with me tried to get slick (no pun intended) shaved the hair off his head, his chest, arm pits and arms, they nurse kindly made him drop his drawers and pulled some from the nether region. So i'm sure that arm hair could be used. Oh yeah, he failed too
If you're that worried about if they take a hair test for drugs, do us a favor: go to your local McDonald's and put in your application instead.
Don't be so selfrightous drugs can stay in your hair for 10 yrs so something I did 4 yrs ago will affect me today?
But I understand it's hard for ya...